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An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.0 MJ when the flywheel is rotating at 17,800 revolutions per minute. What is the moment of inertia of the flywheel?
Determine the density of the proton.
a runner of the 100m dash aims to achieve a 10sec time. he accelerates to his final cruising speed in the first 10m. what is his final cruising speed
compute the force exerted by the man, the work done by the man on the piano, the work done by the friction force, the work done by the force of gravity, and the net work done on the piano.
When winter arrives, the towers stay the similar distance apart and the bridge deck keeps the similar shape as its expansion joints open. When the temperature drops to -10.0°C, what is the tension in the wire? Take Young's modulus for steel to be ..
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. find the size of the image of the tree on your retina
A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 52.0 m/s and returns the shot with the ball traveling horizontally at 36.0 m/s in the opposite direction. What work does the racket do on the ball
Suppose a manufacturing plant has an average sound intensity level of 97.0 dB created by 25 identical machines. Find the total intensity created by all the machines
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 117-kg laser sensor which measures the thickness of the ice, find the tension in the cable towing the sensor
A golf gall is dropped from a height of h1 = 3.45 m. After it bounces it only reaches h2 = 2.23 m. How much energy did the ball transfer to the environment during the bounce in Joules
A bar of length .15 m, width .05 m and negligible height is spinning about its center of mass at 2 radians per second. what is their final angular velocity
Suppose the gasoline in a car engine burns at 637 oC, while the exhaust temperature (the temperature of the cold reservoir) is 106 oC, Determine the ratio of the total work produced by both engines to that produced by the first engine alone
2 positive charges each is 4 micro C located at the positions (0,0) and (20,0) and all coordinates are in cm, calculate the electric field due to the two charges
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